Display panel with minimum borders

Patent metadata

Field	Value
Publication number	US-10162311-B2
Application number	US-201615154774-A
Country	US
Kind code	B2
Filing date	May 13, 2016
Priority date	Dec 15, 2015
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A device includes a substrate with a curvilinear perimeter segment adjoined to a plurality of facets, a display area, a border area surrounding the display area, and connection pads, divided into groups corresponding to the facets, in the border area. A flexible circuit board with arms coupled to the groups of connection pads is included. Another device includes a substrate having a display area, first connection pads within a border area peripheral to the display area, and a flexible circuit board having a first portion including second connection pads configured to be coupled to the first connection pads, and a second portion configured to accommodate a plurality of transmission lines extending from the second connection pads. An arc length of the first portion can be greater than that of the second portion and a center-to-center pitch of the second connection pads can be greater than that of the transmission lines.

First claim

What is claimed is:

1. A device, comprising:
a substrate, including:
a perimeter having a plurality of segments having at least two different shapes including a curvilinear segment adjoined to a plurality of facet segments, each adjacent pair of the plurality of facet segments adjoined at an obtuse angle,
a display area, including pixels on a surface of the substrate,
a border area surrounding the display area, and
a plurality of first connection pads, in the border area, coupled to the pixels, and divided into groups of first connection pads, each of the groups of first connection pads adjacent to a corresponding one of the plurality of facet segments; and

a flexible circuit board having a plurality of arms corresponding to the plurality of facet segments, each of the plurality of arms coupled to a corresponding one of the groups of first connection pads.

2. The device of claim 1 , wherein the curvilinear segment is semicircular.

3. The device of claim 1 , wherein the display area is round.

4. The device of claim 1 , wherein the border area is annular.

5. The device of claim 1 , wherein the border area has a width and, for a given diameter substrate and a given quantity of first connection pads, the width of the border area is reduced by adding facet segments to the plurality of facet segments to reduce a number of first connection pads in each of the groups of first connection pads.

6. The device of claim 1 , further comprising a display driver operationally coupled to the flexible circuit board, wherein the groups of first connection pads adjacent to the plurality of facet segments are coupled to the display driver via the plurality of arms of the flexible circuit board.

7. The device of claim 6 , wherein the flexible circuit board includes only one display driver.

8. The device of claim 1 , wherein each arm of the plurality of arms includes only one fold that is parallel to an edge of a corresponding facet segment, to facilitate wrapping each arm around the perimeter of the substrate and positioning the flexible circuit board adjacent to a backside of the substrate before a plurality of second connection pads of each arm are coupled to corresponding first connection pads of the substrate.

9. The device of claim 1 , wherein an arm of the plurality of arms includes one fold that is parallel to an edge of a corresponding facet segment and a plurality of non-parallel folds, to facilitate wrapping the arm around the perimeter of the substrate and positioning the flexible circuit board adjacent to a backside of the substrate after a plurality of second connection pads of each arm of the plurality of arms are coupled to corresponding first connection pads on the substrate.

10. The device of claim 1 , wherein the device is incorporated into an electronic device selected from a group including at least one of a wearable device and a wristwatch-like wearable device.

11. A device, comprising:
a substrate, including:
a perimeter having a plurality of segments having at least two different shapes including a curvilinear segment adjoined to a plurality of facet segments, each adjacent pair of the plurality of facet segments adjoined at an obtuse angle,
a display area, including pixels on a surface of the substrate,
a border area surrounding the display area, and
a plurality of first connection pads, in the border area, coupled to the pixels, and divided into groups of first connection pads, each of the groups of first connection pads adjacent to a corresponding one of the plurality of facet segments; and

means comprised of one circuit board for coupling to the plurality of first connection pads.

12. The device of claim 11 , wherein the display area is round.

13. The device of claim 11 , wherein the border area is annular.

14. The device of claim 11 , wherein the means comprised of one circuit board for coupling to the plurality of first connection pads comprises a flexible circuit board having a plurality of arms corresponding to the plurality of facet segments, each of the plurality of arms coupled to a corresponding one of the groups of first connection pads.

15. The device of claim 14 , wherein each arm of the plurality of arms includes only one fold that is parallel to an edge of a corresponding facet segment, to facilitate wrapping each arm around the perimeter of the substrate and positioning the flexible circuit board adjacent to a backside of the substrate before a plurality of second connection pads of each arm are coupled to corresponding first connection pads of the substrate.

16. The device of claim 14 , wherein an arm of the plurality of arms includes one fold that is parallel to an edge of a corresponding facet segment and a plurality of non-parallel folds, to facilitate wrapping the arm around the perimeter of the substrate and positioning the flexible circuit board adjacent to a backside of the substrate after a plurality of second connection pads of each arm of the plurality of arms are coupled to corresponding first connection pads on the substrate.

17. A device, comprising:
a substrate, including:
a first surface, an opposite second surface, and an edge at a perimeter of the substrate, wherein the perimeter includes a plurality of segments having at least two different shapes including a curvilinear segment adjoined to N facet segments, adjacent pairs of the N facet segments adjoined at an obtuse angle, wherein N is greater than or equal to two,
a plurality of pixels within a display area of the substrate,
N groups of connection pads, coupled to the plurality of pixels, within a border area peripheral to the display area, each of the N groups of connection pads adjacent to a corresponding one of the N facet segments; and

a flexible circuit board configured with N arms, wherein each of the N arms is coupled to a corresponding one of the N groups of connection pads.

18. The device of claim 17 , wherein the curvilinear segment is semicircular.

19. The device of claim 17 , wherein the display area is round.

20. The device of claim 17 , wherein the border area is annular.

21. The device of claim 17 , wherein the border area has a width and, for a first diameter substrate, the width of the border area is reduced by increasing a value of N.

22. The device of claim 17 , further comprising a display driver, wherein each of the N groups of connection pads is coupled to the display driver via the N arms of the flexible circuit board.

23. The device of claim 17 , wherein each of the N arms includes only one fold, parallel to a corresponding facet segment, to facilitate wrapping the N arms around the edge of the substrate and positioning the flexible circuit board adjacent to a backside of the substrate, before the N arms are coupled to the N groups of connection pads.

24. The device of claim 17 , wherein each of the N arms includes one fold parallel to a corresponding facet segment and a plurality of non-parallel folds, to facilitate wrapping the N arms around the edge of the substrate and positioning the flexible circuit board adjacent to a backside of the substrate after the N arms are coupled to the N groups of connection pads.

25. A device, comprising:
a substrate having an outer perimeter including a curvilinear segment adjoined to a facet segment;
a plurality of pixels on a first side of the substrate, within a display area;
a plurality of first connection pads on the first side of the substrate,

Assignees

• Qualcomm Inc

Inventors

• Hong John
• Bos Jan
• Chu Yi-Nan
• Kim Cheonhong

Classifications

• H05K1/148

  Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means · CPC title

• G02F1/1345

  Conductors connecting electrodes to cell terminals · CPC title

• H05K2201/052

  Branched · CPC title

• G02F2201/56

  Substrates having a particular shape, e.g. non-rectangular · CPC title

• G04G9/12

  using light valves, e.g. liquid crystals · CPC title